/Engine/Source/Editor/UnrealEd/Public/PackageHelperFunctions.h
Get the list of all assets in the specified Collection or Tag
template<class AssetSetPolicy> bool QuerySetContent ( [FName](API\Runtime\Core\UObject\FName) InCollectionName, [ECollectionShareType::Type](API\Developer\CollectionManager\ECollectionShareType\Type) InType, [TArray](API\Runtime\Core\Containers\TArray)< [FSoftObjectPath](API\Runtime\CoreUObject\UObject\FSoftObjectPath) > & OutAssetPaths )